<template>
  <div class="permission-container">
    <div class="app-container">
      <!-- 表格 -->
      <el-card>
        <div style="text-align: right; margin-bottom: 20px">
          <el-button type="primary" size="small" @click="dialogFn(1, 0)">添加权限</el-button>
        </div>
        <el-table border :data="list" row-key="id">
          <el-table-column label="名称" prop="name" />
          <el-table-column label="标识" prop="code" />
          <el-table-column label="描述" prop="description" />
          <el-table-column label="操作">
            <template slot-scope="scope">
              <el-button v-if="scope.row.type === 1" type="text" @click="dialogFn(2, scope.row.id)">添加</el-button>
              <el-button type="text" @click="editFn(scope.row.id)">编辑</el-button>
              <el-button type="text" @click="deleteFn(scope.row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>
        <el-dialog
          :visible.sync="showDialog"
          :title="isEdit ? '编辑权限' : '添加权限'"
          :close-on-click-modal="false"
          :close-on-press-escape="false"
          @close="closeFn"
        >
          <!-- 表单内容 -->
          <el-form ref="form" label-width="100px" :model="formData" :rules="rules">
            <el-form-item label="权限名称" prop="name">
              <el-input v-model="formData.name" />
            </el-form-item>
            <el-form-item label="权限标识" prop="code">
              <el-input v-model="formData.code" />
            </el-form-item>
            <el-form-item label="权限描述">
              <el-input v-model="formData.description" />
            </el-form-item>
            <el-form-item label="权限启用">
              <el-switch
                v-model="formData.enVisible"
                active-text="启用"
                active-value="1"
                inactive-text="不启用"
                inactive-value="0"
              />
            </el-form-item>
          </el-form>

          <template #footer>
            <div style="text-align: right;">
              <el-button @click="showDialog = false">取消</el-button>
              <el-button type="primary" @click="submitFn">确定</el-button>
            </div>
          </template>
        </el-dialog>
      </el-card>
    </div>
  </div>
</template>
<script>
import {
  getPermissionsListAPI,
  addPermissionAPI,
  delPermissionAPI,
  updatePermissionAPI,
  getPermissionDetailAPI
} from '@/api/permissions'
import { tranListToTreeData } from '@/utils/tranListToTreeData'

export default {
  name: 'Permission',
  data() {
    const validCode = (rule, value, callback) => {
      // 添加时的校验：code不能重复
      let existCodeList = this.originList
      if (this.isEdit) {
        // 编辑时的校验: code能取自己
        existCodeList = this.originList.filter(item => item.id !== this.formData.id)
      }
      existCodeList.map(it => it.code).includes(value) ? callback(new Error(value + '已经占用')) : callback()
    }

    const validName = (rule, value, callback) => {
      // 添加时的校验： 名字不能取子元素的名字
      let existNameList = this.originList.filter(item => item.pid === this.formData.pid)
      if (this.isEdit) {
        // 编辑时的校验： 名字不能取兄弟（排除自己）的名字
        // 找兄弟，排除自己
        existNameList = this.originList.filter(item => item.pid === this.formData.pid && item.id !== this.formData.id)
      }
      existNameList.map(it => it.name).includes(value) ? callback(new Error(value + '已经占用')) : callback()
    }
    return {
      isEdit: false,
      list: [],
      showDialog: false, // 是否显示弹层
      formData: {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      },
      rules: {
        code: [
          { message: '不能为空', required: true, trigger: 'blur' },
          { validator: validCode, trigger: 'blur', message: '不能为空' }
        ],
        name: [
          { message: '不能为空', required: true, trigger: 'blur' },
          { validator: validName, trigger: 'blur' }
        ]
      },
      originList: []
    }
  },
  created() {
    this.getPermissionsListAPI()
  },
  methods: {
    async editFn(id) {
      this.isEdit = true
      console.log(id)
      const res = await getPermissionDetailAPI(id)
      this.formData = res.data
      this.showDialog = true
      console.log(res)
    },
    async getPermissionsListAPI() {
      const res = await getPermissionsListAPI()
      this.list = tranListToTreeData(res.data)
      this.originList = res.data.map(({ id, pid, name, code }) => ({ id, pid, name: name.trim(), code }))
      console.log(this.list)
    },

    dialogFn(type, id) {
      this.showDialog = true
      console.log(type, id)
      this.formData.type = type
      this.formData.pid = id
    },
    deleteFn(id) {
      this.$confirm('你确定要删除吗？')
        .then(() => {
          this.delPermission(id)
        })
        .catch(() => {})
    },
    async updatePermission() {
      const res = await updatePermissionAPI(this.formData)
      console.log(res)
      this.showDialog = false
      this.getPermissionsListAPI()
      this.$message.success('修改成功')
    },
    async delPermission(id) {
      const res = await delPermissionAPI(id)
      console.log(res)
      this.$message.success('删除成功')
      this.getPermissionsListAPI()
    },
    submitFn() {
      this.isEdit ? this.updatePermission() : this.addPermission()
    },
    async addPermission() {
      const res = await addPermissionAPI(this.formData)
      console.log(res)
      this.showDialog = false
      this.getPermissionsListAPI()
    },
    closeFn() {
      this.formData = {
        name: '',
        code: '',
        description: '',
        enVisible: '0',
        pid: '',
        type: ''
      }

      this.$refs.form.resetFields()
    }
  }
}
</script>
